Machine for rolling coupling-pins



(No Modelf) v R. R. TURNER.

MACHINE FOR ROLLING COUPLINGPINS.

I 110.291,11). Patented 1111.1, 1884.

, l A"'*2111111 v I -at one end with semioircular UNITEIS] STATES PATENT OEETCEQ ROBERT RICHARDSON TURNER, OF "WEST MIDDLESEX, PENNSYLVANIA.

MACHINE FOR ROLLING COUPLING-PINS.

SPECIFICATION forming part of Letters Patent No. 291,110, dated January 1, 1884. i

Application filed March 10, 1883. (No model.)

To all whom t may concern.'

, Be it known that I, ROBERT RICHARDSON TURNER, of West Middlesex, in the county of Mercer and State of Pennsylvania, have invented certain Improvements in Machines for Rolling Coupling-Pins for Cars, of which the following is a specication.

The aim of this invention is to provide an inexpensive means for manufacturing coupling-pins for use in railway-cars with rapidity and uniformity; and to this end it consists, essentially, in a pair of co-operating grooved rolls provided with dies of such shape that round iron rods passed between the rolls will be divided by said dies into pins of suitable length, and the heads and points formed upon said pins at the same operation.

Referring to the accompanying drawings, Figure lis a rear elevation of my machine. Fig. 2 is 'a vertical section of the same on the line a: 'a'. Fig. 3 is a perspective view of one of the finished pins.

A represents a strong rigid frame, and B C two co-operating rolls, having their journals mounted in suitable bearings in said frame and connected by gear-wheels D and E, by which the two rolls are caused to move with equal surfacespeeds. The rolls are provided with corresponding grooves, a and b, of a semicircular cross-section, for the purpose of reducing the iron to the formof round rods of a diameter equal to that of the bodies of the required pins. The rolls are further provided grooves c, of the same diameter as the others, but each provided with two dies, d, located diametrically opposite each other. The dies d of the two rolls are alike in form, and the parts are arranged in such manner that as the.= rolls are revolved the dies upon one are brought in succession directly opposite or in register with those upon the other. The pins to be produced are of the form represented in Fig. 3, having a cylindrical body with one end flattened and extended laterally beyond the cylindrical body portion to form the head c, and the vopposite end pointed or tapered, as shown at f. Each die has its surface made of a form corresponding with one side of the head` or face c of one pin, and also with the adjoining tapered point of the next pin.

It is to be observed that the grooves c are not designed to change the sectional form of the round rod or body, but that they serve merely -to guide and present the rods to the dies, which act at the proper points to form the ends of the pin. Thus it is that the rod, in its passage through the grooves c, is acted -upon only at the portions forming the ends of the pins. Consequently I am permitted to leave the grooves c of full width throughout their length, and to locate the surfaces of the dies wholly within the periphery'of the rolls. This fact admits of the rolls being reduced in diameter, or shouldered down circumferentially along the sides of the grooves c, and of a guide being seated in this reduced portion, as hereinafter explained,without interference with the dies.

In operating the machine, the metal rods are passed between the rolls into the groove c. The revolution of the rolls causes the co-operating dies to be brought toward each other against opposite sides of the rod, whereby the dies are caused to divide or nearly divide the rod into lengths suitable for pins, at the same time flattening and expanding the end of one section, so as to form the head of a pin, and tapering the adjacent point of the next section for the next pin. It will thus be seen that each pair of dies serves the threefold purpose of dividing the rod, of. heading one pin, and of pointing the next. Each pin having its point formed by one pair of dies has its head formed by the next pair when they in turn operate thereon.

It is obvious that the rolls may be provided each with but a single die, and that a single pin will be produced at each revolution 5 but as such construction would necessitate the employment of smaller rolls and would limit `the capacity of the machine, it is preferred to employ the large rolls represented in the drawings, each with two dies thereon, sol that two pins will be produced at each revolution.

In order to afford room for the widened or expanded head formed by the action of the dies, the rolls are recessed or shouldered circumferentially, as shown at g, on each side of the groove c.

The dies d may be constructed each in one or more pieces, dovetailed or otherwise secured roo 2 g :winnie within the rolls,in order that therv may moved when required, or the diesI may be made integral with the rolls, the whole being formed in one piece.

It is preferred to retain the circumferential recess tr/,for the reason that such construction admits of the endet' the guide F being seated therein, and of the rolls revolving without interference from the guide. rlhis guide consists of a plate secured to the frame or other suitable support in front of the rolls, with one end seated in the groove ot' the lower roll in position to receive and sustain the rod or pins as they pass from between the rolls. A Y

The guide, which will be grooved or ehanneled, as indicated in dotted lines in Fig. 2, serves to direct the metal in a right line in the course of its passage between the rolls, thus avoiding the diiiieulty which would otherwise be encountered, owing to the liability bere- I of the metal tonievc Iout of line, and thus issue with the heads and points more fully deA vcloped on one side than the other.

"What l claim as my invention isl. ln a machine l'or rolling ear-coupling pins, the two cooperating rolls, each provided with a semicireular groove, rabbets or shoulders following the sides of the groove, and a heading and pointing die seated wholly within the periphery ol' the roll, as described and shown.

.2. In a machine for rolling coupling-pins, the two rolls B C, each provided with a semicircular groove, c, the circumferential recess g, and the die d, as described, in combination with the guide having its end seated in the recesses, as described and shown.

ROBERT RICHARDSON TURNER.

\Vitnesses:

O. M. TALL, Gino. M. Hormis. 

